膜脂分子在脂质双层中的运动方式不包括（）。 A.曲线运动 B.分子摆动 C.旋转 D

髋关节的功能位为

A．伸展位，稍内旋

B．伸展位，稍外旋

C．稍屈曲位，稍内旋

D．稍屈曲位，稍外旋

E．伸直位，防止内、外旋

一种对偏头痛有明显疗效的新药正在推广。不过服用这种药可能加剧心脏病。但是只要心脏病患者在服用该药物时严格遵从医嘱，它的有害副作用完全可以避免。因此，关于这种药物副作用的担心是不必要的。 上述论证基于以下哪项假设

A．药物有害副作用的产生，都是因为患者在服用时没有严格遵从医嘱。

B．有心脏病的偏头痛患者在服用上述新药时不会违背医嘱。

C．大多数服用上述新药的偏头痛患者都有心脏病。

D．上述新药有多种副作用，但其中最严重的是会加剧心脏病。

E．上述新药将替代目前其他治疗偏头痛的药物。

为了研究物体的运动状态与受力情况之间的关系，用钩码（重1牛）、测力计、打点计时器和纸带等进行实验。试验中，先将钩码挂在已调好的测力计下，且处于静止状态，如图（a）所示。接着，在钩码的下端固定纸带，并使纸带穿过打点计时器，然后分别三次拉动钩码竖直向上运动，每次拉动过程中，观察到一段时间内测力计示数是不变的，纸带上的点记录了这段时间内钩码的运动情况，三次实验如图（b）、（c）、（d）所示。请仔细观察图中的测力计示数和对应的纸带，归纳得出初步结论。

（1）由图（a）与（b）与（c）可得                                                            。

（2）由图（a）与（d）或(b)与（d）或（c）与（d）可得                                                    。

In order to learn a foreign language well，four things are necessary． First，we must understand the language when we hear it spoken．Secondly, we must be able to speak it ourselves, with confidence and without hesitation（犹豫）． Thirdly，we must do much reading． Finally， we must be able to write it. We must be able to make sentences that are correct in grammar．

There are no shortcuts to success in language learning． A good memory is a great help，but it is not enough only to memorize the rules from a grammar book．It is not much learning by heart long lists of words and their meanings，studying the dictionary and so on．We must learn by using the language．

If we are pleased with a few rules we have memorized，we are not really learning the language．We must “learn through use．” Practice is important．We must practise speaking and writing the language whenever we can．

小题1:The most important things to learn a foreign language are ＿＿＿＿＿.

A．understanding and speaking

B．listening，speaking，reading and writing

C．writing and understanding

D．memorizing and listening小题2:Someone hears and writes English very well， but he speaks it very badly． This is because ＿＿＿＿＿．

A．he doesn’t understand the language when he hears it spoken

B．he doesn’t have a good memory

C．he always remembers lists of words and their meanings

D．he often hesitates（犹豫）to practise speaking it小题3:One can never learn a foreign language well by ＿＿＿＿。

A．doing much practice

B．studying the dictionary

C．learning through use

D．using the language小题4:Which is the most important in learning a foreign language？

A．good memory

B．Speaking．

C．Practice．

D．Writing

下列各项中，哪种化学物品中毒不会引起变性血红蛋白血症（）。

A.氰化物

B.伯氨喹

C.苯妥英钠

D.一氧化碳

E.亚硝酸盐